add test for scalar functions on geometry that is being changed
add wip fix

ENH: Textures can be init'd from ImageData, they can be modified at runtime, you can also swap textures

REFAC: SceneObjects and VisualModels can now be both added AND removed to the Renderer during runtime, new event based scene modification/observer pattern

REFAC: EventObject uses vector now, module sleep option, FemurObject, parallelFor max, clear some warnings